EP1927983A3 - Optical head, optical disc apparatus including the optical head, and information processing apparatus including the optical disk apparatus - Google Patents

Optical head, optical disc apparatus including the optical head, and information processing apparatus including the optical disk apparatus Download PDF

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Publication number
EP1927983A3
EP1927983A3 EP07254552A EP07254552A EP1927983A3 EP 1927983 A3 EP1927983 A3 EP 1927983A3 EP 07254552 A EP07254552 A EP 07254552A EP 07254552 A EP07254552 A EP 07254552A EP 1927983 A3 EP1927983 A3 EP 1927983A3
Authority
EP
European Patent Office
Prior art keywords
optical
apparatus including
optical head
head
information processing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07254552A
Other languages
German (de)
French (fr)
Other versions
EP1927983A2 (en
Inventor
Junichi Kitabayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of EP1927983A2 publication Critical patent/EP1927983A2/en
Publication of EP1927983A3 publication Critical patent/EP1927983A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/13—Optical detectors therefor
    • G11B7/131—Arrangement of detectors in a multiple array
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/127—Lasers; Multiple laser arrays
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/128—Modulators
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1353—Diffractive elements, e.g. holograms or gratings
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
    • G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

An optical head is used to irradiate a beam onto an optical recording medium having multiple recording positions in the thickness direction, and to receive a reflection beam reflected from the recording medium (15). The optical head has a light source (111), an optical system, and a detector (170). The optical system transmits the irradiation beam from the light source (111) to the recording positions of the medium (15), separates optical components based on wavelength, and transmits the components to respective detection positions, where the components are individually detected.
EP07254552A 2006-11-29 2007-11-22 Optical head, optical disc apparatus including the optical head, and information processing apparatus including the optical disk apparatus Withdrawn EP1927983A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006321198A JP2008135125A (en) 2006-11-29 2006-11-29 Optical head, optical disk device, and information processing device

Publications (2)

Publication Number Publication Date
EP1927983A2 EP1927983A2 (en) 2008-06-04
EP1927983A3 true EP1927983A3 (en) 2008-11-26

Family

ID=39149227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07254552A Withdrawn EP1927983A3 (en) 2006-11-29 2007-11-22 Optical head, optical disc apparatus including the optical head, and information processing apparatus including the optical disk apparatus

Country Status (3)

Country Link
US (1) US20080205244A1 (en)
EP (1) EP1927983A3 (en)
JP (1) JP2008135125A (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112005003649T5 (en) * 2005-08-03 2008-06-12 Fujitsu Ltd., Kawasaki Optical information recording / reproducing apparatus and optical information recording medium
WO2007015298A1 (en) * 2005-08-03 2007-02-08 Fujitsu Limited Optical information recording and reproducing device, and optical information recording medium
JP5181989B2 (en) * 2008-10-03 2013-04-10 ソニー株式会社 Short pulse light source device, laser driving method, optical pickup and optical disk device
WO2010038909A1 (en) * 2008-10-03 2010-04-08 ソニー株式会社 Optical pickup, optical information recording method, and optical disk device
JP2011060396A (en) * 2009-09-14 2011-03-24 Hitachi-Lg Data Storage Inc Optical disk device and optical disk recording and reproducing method
JP2011229625A (en) * 2010-04-26 2011-11-17 Fujifilm Corp Endoscopic system
JP2011229603A (en) * 2010-04-26 2011-11-17 Fujifilm Corp Endoscopic system
US10057488B2 (en) * 2016-08-12 2018-08-21 Avegant Corp. Image capture with digital light path length modulation
US10401639B2 (en) 2016-08-12 2019-09-03 Avegant Corp. Method and apparatus for an optical path length extender
US10516879B2 (en) 2016-08-12 2019-12-24 Avegant Corp. Binocular display with digital light path length modulation
US10379388B2 (en) 2016-08-12 2019-08-13 Avegant Corp. Digital light path length modulation systems
US10809546B2 (en) 2016-08-12 2020-10-20 Avegant Corp. Digital light path length modulation
US10185153B2 (en) 2016-08-12 2019-01-22 Avegant Corp. Orthogonal optical path length extender
US10187634B2 (en) 2016-08-12 2019-01-22 Avegant Corp. Near-eye display system including a modulation stack

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5526338A (en) * 1995-03-10 1996-06-11 Yeda Research & Development Co. Ltd. Method and apparatus for storage and retrieval with multilayer optical disks
GB2323205A (en) * 1997-03-12 1998-09-16 Sharp Kk Multilayer optical data storage device
US5966364A (en) * 1996-08-26 1999-10-12 Laser Dynamcics, Inc. Optical pick-up apparatus for multiple data surface optical disk system
US20010038596A1 (en) * 2000-03-17 2001-11-08 Duanyi Xu Multi-wavelength optical disc, apparatus and method for reading and writing signal therefor
US20030156525A1 (en) * 1995-10-04 2003-08-21 Bunsen Fan Method of and system for block-by-block data retrieval for optical storage

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63113947A (en) 1986-10-31 1988-05-18 Nippon Telegr & Teleph Corp <Ntt> Multi-wavelength write type optical element
JP2988732B2 (en) 1991-01-17 1999-12-13 株式会社東芝 Information recording / reproducing device
JP2759635B2 (en) 1996-01-17 1998-05-28 郵政省通信総合研究所長 Method and apparatus for generating undiffracted light beam
US5760901A (en) * 1997-01-28 1998-06-02 Zetetic Institute Method and apparatus for confocal interference microscopy with background amplitude reduction and compensation
JPH1145456A (en) 1997-05-30 1999-02-16 Fuji Electric Co Ltd Optical head
KR20010083041A (en) 1998-06-02 2001-08-31 추후 Methods and apparatus for confocal interference microscopy using wavenumber domain reflectometry and background amplitude reduction and compensation
US20020197042A1 (en) * 2001-04-06 2002-12-26 Shigeo Kittaka Optical device, and wavelength multiplexing optical recording head
JP2002304760A (en) 2001-04-06 2002-10-18 Nippon Sheet Glass Co Ltd Wavelength multiplex optical recording head
JP4456881B2 (en) 2004-01-28 2010-04-28 株式会社リコー Laser processing equipment
JP2006321198A (en) 2005-05-20 2006-11-30 Toyobo Co Ltd Gas barrier laminated film

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5526338A (en) * 1995-03-10 1996-06-11 Yeda Research & Development Co. Ltd. Method and apparatus for storage and retrieval with multilayer optical disks
US20030156525A1 (en) * 1995-10-04 2003-08-21 Bunsen Fan Method of and system for block-by-block data retrieval for optical storage
US5966364A (en) * 1996-08-26 1999-10-12 Laser Dynamcics, Inc. Optical pick-up apparatus for multiple data surface optical disk system
GB2323205A (en) * 1997-03-12 1998-09-16 Sharp Kk Multilayer optical data storage device
US20010038596A1 (en) * 2000-03-17 2001-11-08 Duanyi Xu Multi-wavelength optical disc, apparatus and method for reading and writing signal therefor

Also Published As

Publication number Publication date
US20080205244A1 (en) 2008-08-28
EP1927983A2 (en) 2008-06-04
JP2008135125A (en) 2008-06-12

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